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(I) Name the Catalyst Which Helps in the Conversion of Sulphur Dioxide to Sulphur Trioxide in Step C. (Ii) in the Contact Process for the Manufacture of Sulphuric Acid, - Chemistry

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Short Note


(i) Name the catalyst which helps in the conversion of sulphur dioxide to sulphur trioxide in step C.

(ii) In the contact process for the manufacture of sulphuric acid, sulphur trioxide is not converted to sulphuric acid by reacting it with water. Instead a two-step procedure is used. Write the equations for the two steps involved in D.

(iii) What type of substance will liberate sulphur dioxide from sodium sulphite in step E?

(iv) Write the equation for the reaction by which sulphur dioxide is converted to sodium sulphite in step F ?

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Solution 1

(i) C = Vanadium pentoxide is the catalyst which helps in the conversion of sulphur dioxide to sulphur trioxide.

(ii) D involves the following two steps:
     a) SO3 + H2SO4 → H2S2O7
     b) H2SO7 + H2O → 2H2SO4

(iii) In step E, Dilute sulphuric acid will help in the liberation of sulphur dioxide from sulphites.

(iv) This is the reaction by which sulphur dioxide is converted to sodium sulphite in step F.
2NaOH + SO2 → Na2SO3 + H2O

Solution 2

(a) The catalyst which helps in the conversion of sulphur dioxide to sulphur trioxide in step C is Vanadium pentoxide.

(b) The two steps for the conversion of sulphur trioxide to sulphuric acid is:

(i) SO+ H2SO4 → H2S2O7

(ii) H2S2O7 + H2O → 2H2SO4

(c)The substance that will liberate sulphur dioxide in step E is dilute H2SO4.

(d) The equation for the reaction by which sulphur dioxide is converted to sodium sulphite in step F is:

SO2+2NaOH → Na2SO3+H2O

         Or

Na2O+SO2 → Na2SO3

Concept: Chemical Properties of Sulphuric Acid
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APPEARS IN

Frank ICSE Class 10 Chemistry Part 2
Chapter 10 Study of Sulphur Compound: Sulphuric Acid
Exercise 5 | Q 4 | Page 253
Selina Concise Chemistry Class 10 ICSE
Chapter 11 Sulphuric Acid
Intext Questions | Q 4 | Page 175
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